Most importantly dynamic sections are now default.

Cloze documents now use this correctly.

Change import paths of CommonModule files in editor and player

#233

#229

#222

- Fixed dynamicPositioning property of all section children. This 
property was accidentally set with faulty values in the last version.
- Also sanitizes likert and likert row elements, because rows now have a 
TextImageLabel instead of plain text.

The solution is to always show the section menu of the selected section. 
No more hovering shenanigans.

#223

- Use `inputmode` 'none' to hide the virtual keyboard of the os
- Use DeviceService to detect if the player is running
on a mobile device

verticalButtonAlignment is the new property for likert rows, which tells 
the actual radio button to either be at the top or in the middle.

The whole DOM structure is kind of botched. This is a quick fix and 
should be reviewed.